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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (AMQ-5280) Incorrect handling of unknown values in selectors
Date Fri, 18 Jul 2014 10:07:05 GMT

     [ https://issues.apache.org/jira/browse/AMQ-5280?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Timothy Bish closed AMQ-5280.
-----------------------------

    Resolution: Duplicate

Appears to be an accidental duplicate.

> Incorrect handling of unknown values in selectors
> -------------------------------------------------
>
>                 Key: AMQ-5280
>                 URL: https://issues.apache.org/jira/browse/AMQ-5280
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.8.0
>            Reporter: Grigroy Sobko
>
> Due to JmsMessage specification :
> http://docs.oracle.com/javaee/1.4/api/javax/jms/Message.html
> There are rules how unknown Values evaluates. 
> There how AND operator should handle unknown:
>     UNKNOWN AND FALSE => FALSE 
>     FALSE AND UNKNOWN => FALSE 
> And that's how it is handled in ActiveMQ:
>     UNKNOWN AND FALSE => UNKNOWN (!!!)
>     FALSE AND UNKNOWN => FALSE 
> I've wrote test to reproduce this:
> {code}
> package org.activemq.test;
> import org.apache.activemq.command.ActiveMQMessage;
> import org.apache.activemq.command.ActiveMQTopic;
> import org.apache.activemq.filter.BooleanExpression;
> import org.apache.activemq.filter.MessageEvaluationContext;
> import org.apache.activemq.selector.SelectorParser;
> import org.junit.Before;
> import org.junit.Test;
> import javax.jms.JMSException;
> import javax.jms.Message;
> import static org.junit.Assert.assertEquals;
> import static org.junit.Assert.assertTrue;
> public class SelectorUnknownHandlingTest {
>     private Message message;
>     @Before
>     public void setUp() throws Exception {
>         message = createMessage();
>     }
>     @Test
>     public void testUnknown() throws Exception {
>         // Some unset property with gt operator => unknown
>         assertSelectorEvaluatesToUnknown(message, "(unknownProp > 0)");
>     }
>     @Test
>     public void testUnknownAndFalse() throws Exception {
>         // false and unknown => false
>         assertSelectorEvaluatesToFalse(message, "(falseProp AND unknownProp > 0)");
>         // THIS ASSERTION FAILS !! IT EVALUATES TO UNKNOWN INSTEAD
>         // unknown and false => false
>         assertSelectorEvaluatesToFalse(message, "(unknownProp > 0 AND falseProp)");
>     }
>     @Test
>     public void testUnknownOrTrue() throws Exception {
>         // unknown or true => true
>         assertSelectorEvaluatesToTrue(message, "(unknownProp > 0 OR trueProp)");
>         // true or unknown => true
>         assertSelectorEvaluatesToTrue(message, "(trueProp OR unknownProp > 0)");
>     }
>     private void assertSelectorEvaluatesToUnknown(Message message, String selector) throws
JMSException {
>         assertSelector(message, selector, false);
>         assertSelector(message, "not(" + selector + ")", false);
>     }
>     private void assertSelectorEvaluatesToFalse(Message message, String selector) throws
JMSException {
>         assertSelector(message, selector, false);
>         assertSelector(message, "not(" + selector + ")", true);
>     }
>     private void assertSelectorEvaluatesToTrue(Message message, String selector) throws
JMSException {
>         assertSelector(message, selector, true);
>         assertSelector(message, "not(" + selector + ")", false);
>     }
>     protected Message createMessage() throws JMSException {
>         Message message = createMessage("FOO.BAR");
>         message.setJMSType("selector-test");
>         message.setJMSMessageID("connection:1:1:1:1");
>         message.setBooleanProperty("trueProp", true);
>         message.setBooleanProperty("falseProp", false);
>         return message;
>     }
>     protected void assertSelector(Message message, String text, boolean expected) throws
JMSException {
>         BooleanExpression selector = SelectorParser.parse(text);
>         assertTrue("Created a valid selector", selector != null);
>         MessageEvaluationContext context = new MessageEvaluationContext();
>         context.setMessageReference((org.apache.activemq.command.Message)message);
>         boolean value = selector.matches(context);
>         assertEquals("Selector for: " + text, expected, value);
>     }
>     protected Message createMessage(String subject) throws JMSException {
>         ActiveMQMessage message = new ActiveMQMessage();
>         message.setJMSDestination(new ActiveMQTopic(subject));
>         return message;
>     }
> }
> {code}



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